Mr. Sanni started his Insurance career with the then Insurance Department of the Federal Ministry of Trade (now National Insurance Commission NAICOM) in 1977 and later joined African Alliance Insurance Company Limited as Assistant Superintendent. He rose to the position of a Deputy Manager before resigning to join Milverton Insurance Company Limited in 1987 as a General Manager. In 1991 Mr. Sanni became the pioneer Managing Director of Perpetual Assurance Company Limited and retired from the Company in 2001 after putting in 10 years of meritorious service. He was appointed a Director of City Covenant Insurance Brokers Limited on the 30th of January 2009.

Mr. Sanni, who is also into Estate development and Hospitality Industry, is an associate member of the Chartered Insurance Institute of London and Nigeria.